Impact melt rock from Jänisjärvi astrobleme: Study of the iron-bearing phases using Raman spectroscopy, X-ray diffraction, and Mössbauer spectroscopy

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A. A. Maksimova, D. A. Zamiatina, D. A. Zamyatin, A. D. Ryanskaya, A. V. Chukin, M. I. Oshtrakh

MAPS
Version of Record online: 03 March 2022

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“Iron-bearing phases in the impact melt rock (impactite) from Jänisjärvi astrobleme (Karelia, Russian Federation) were studied by optical microscopy, electron probe microanalysis, Raman spectroscopy, X-ray diffraction, and 57Fe Mössbauer spectroscopy. The phase composition and the contents of elements were determined in the studied impactite. The Raman spectra of cordierite, chamosite, and ilmenite in the impact melt rock were measured and analyzed. The 57Fe Mössbauer spectrum of Jänisjärvi impactite demonstrated the presence of different iron microenvironments in the iron-bearing phases in the impact melt rock, which were assigned to cordierite; the M1, M2, M3, and M4 sites in chamosite; ilmenite; and ferrihydrite.”

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